R1150RT Hall Effect Sensors

[Roger 04 RT]

Does anyone here know why there are two hall sensors. One would be enough since the plugs and injectors are fired at the same time. I'm debugging a subtle problem and I realized I don't know why there are two--redundancy, resolution or different functions driven from each.

Any insight would be appreciated.

RB

[Jim McKenzie-Smith]

So each hall sensor fires two cylinders where one spark is for ignition and the other is a wasted spark at or near bottom dead centre on the other cylinder. If you have a look at the timing of the K75 you will see the same thing even for three cylinders.

 

Jim

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[Dual Sport Motorcycle Clinic]

AFAIK, the one sensor fires the plugs, the other fires the fuel pump. You cannot fire the plugs at BDC as that would ignite the uncompressed fuel in that cylinder.

If you turn the motor over slowly by hand, you will hear the fuel pump running as the sensor is activated.

Regards
Guy

Dual Sport Motorcycle Clinic - Port Elizabeth

---

From: "Jim McKenzie-Smith" <ed...@bigpond.com>

Sender: gs-...@googlegroups.com

Date: Mon, 19 Aug 2013 12:59:59 +1000

To: <gs-...@googlegroups.com>

ReplyTo: gs-...@googlegroups.com

Subject: RE: [GS-911] R1150RT Hall Effect Sensors

[Roger 04 RT]

Thanks for the inputs so far. Last night I ran the hall sensor test per the instructions, using the rear wheel to turn the engine. Using the rear wheel leads to some unevenness of the speed of turning the engine.

I did see each sensor change state but not in a 1 2 1 2 1 2 sequence like I expected. It was more like 1 2 1 1 1 2 2 1 2 etc.

Can anyone who has run the test tell me if this is normal or is it the sign of a compromised Hall sensor?
RB

[Dual Sport Motorcycle Clinic]

Nope, definitely not normal.

If you remove the HES and open up the insulation on the wiring you will find
that it has disintegrated. If you can find the correct silicon cabling you
can try to rewire it. Your alternative is a new HES.

Where are you located. I have sensors in stock.

Regards
Guy

-----Original Message-----
From: gs-...@googlegroups.com [mailto:gs-...@googlegroups.com] On Behalf Of
Roger 04 RT

[Roger 04 RT]

Hi Guy,
Thanks for responding so quickly. It didn't seem right but I had never run the test before. I'm in Massachusetts but have easy access to a spare but thank you for offering. Are you in SA?
Roger

[dirk1....@telenet.be]

I think it's normal. I noticed this on the last 3 1150's I tested, but because I got signals from both sensors, which was the purpose of the test, I didn't pay much attention to the irregularity of the sequence.

Rgds,
Dirk

----- Oorspronkelijk e-mail -----
Van: "Roger 04 RT" <rogerb...@hotmail.com>
Aan: gs-...@googlegroups.com
Verzonden: Maandag 19 augustus 2013 14:15:17
Onderwerp: Re: [GS-911] R1150RT Hall Effect Sensors

[Roger 04 RT]

Dirk, Thanks. I think when I get a minute I'm going to pull the cover and turn the crankshaft and see if I can get a 1,2,1,2,1,2 sequence. Still have my slow start problem. Everything else in the fuel and ignition system has been checked and measured and is okay. Roger

[dirk1....@telenet.be]

Hi Roger,

someone suggested wiring problems. I know these wires tend to disintegrate, but if this was the case I suppose you would have noticed ignition failures before. If the bike is running fine and continues to do so even when very hot, the wiring is ok.

I'll check it on the next one I do.

Cheers,

Dirk

---

Van: "Roger 04 RT" <rogerb...@hotmail.com>
Aan: gs-...@googlegroups.com

Cc: "dirk1 pauwels" <dirk1....@telenet.be>
Verzonden: Donderdag 29 augustus 2013 17:01:24

[Alan Davies]

Hello Roger,

 

Not sure if this is the same issue, but I had a long term problem with my 65K miles 2003 twin spark 1150RT (owned from new) intermittently running rough only at low revs, and occasionally cutting out. Through various bits of advice I changed plugs, wiring, hall sensors all to no avail. In desperation I even tried reconditioned injectors, although I was convinced it was an ignition issue because of the odd backfire that occurred, again no success. Finally traced it to one of the stick ignition coils that fit onto the primary plugs. Might be worth a punt trying this? Just buy one and try it both sides. Murphy's law indicates it will be second cylinder you try that has the issue.

 

PS. Make sure you firmly push the coils into place on the plugs, even tapping them lightly to be sure they are fully home, otherwise you might throw in another variable. Yes I do speak from bitter experience!

 

Good luck

 

Alan

From: "dirk1....@telenet.be" <dirk1....@telenet.be>
To: gs-...@googlegroups.com
Sent: Thursday, 29 August 2013, 16:38
Subject: Re: [GS-911] R1150RT Hall Effect Sensors

Hi Roger,

someone suggested wiring problems. I know these wires tend to disintegrate, but if this was the case I suppose you would have noticed ignition failures before. If the bike is running fine and continues to do so even when very hot, the wiring is ok.

I'll check it on the next one I do.

Cheers,

Dirk

[Roger 04 RT]

Hi Alan,
Thanks for the suggestion of stick coils. That could possibly be the problem. This is really a slow one to debug because I can really only see the problem in the first 10 seconds of running. Glad. Have a GS-911.

I'm just back from some travel and going to get at it this's week.
Roger